“I ALWAYS buy Canadian. I wish stores would highlight Canadian products to make it easier when I’m in a hurry or don’t have my glasses with me,” one user commented on Wert’s Facebook video.

While the campaigns are gaining momentum, it’s unclear whether they will truly have an impact.

Marie-Claude Fortin, a lecturer at the University of British Columbia who studies the Canadian dairy system, explained that carrying through with “buy local” pledges can be tricky in this case.

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Fortin said those trying to follow through with the promise will first face the challenge of packaging.

“Dairy processing plants don’t have anything that forces them to disclose the source of the milk,” she said, explaining that organizations pledging to do so are doing it for marketing reasons, rather than regulatory reasons. That means some can opt out.

She added that for larger processing plants, it may be difficult to even differentiate between Canadian and American milk.

“Milk, which is going to be coming in bulk, is going to be processed in these huge plants,” Fortin explained.